Retrieval-based-Voice-Conversion-WebUI Error while converting in Model Inference

After training, I proceed to input the Inferencing voice and index file to convert but all of them gave the same error. How do I fix this problem?

"<All keys matched successfully> Traceback (most recent call last): File "C:\Users\Asus\AI\RVC-beta\RVC-beta-v2-0528\my_utils.py", line 14, in load_audio ffmpeg.input(file, threads=0) File "C:\Users\Asus\AI\RVC-beta\RVC-beta-v2-0528\runtime\lib\site-packages\ffmpeg_run.py", line 325, in run raise Error('ffmpeg', out, err) ffmpeg._run.Error: ffmpeg error (see stderr output for detail)

During handling of the above exception, another exception occurred:

Traceback (most recent call last): File "C:\Users\Asus\AI\RVC-beta\RVC-beta-v2-0528\infer-web.py", line 161, in vc_single audio = load_audio(input_audio_path, 16000) File "C:\Users\Asus\AI\RVC-beta\RVC-beta-v2-0528\my_utils.py", line 19, in load_audio raise RuntimeError(f"Failed to load audio: {e}") RuntimeError: Failed to load audio: ffmpeg error (see stderr output for detail)

Traceback (most recent call last): File "C:\Users\Asus\AI\RVC-beta\RVC-beta-v2-0528\runtime\lib\site-packages\gradio\routes.py", line 321, in run_predict output = await app.blocks.process_api( File "C:\Users\Asus\AI\RVC-beta\RVC-beta-v2-0528\runtime\lib\site-packages\gradio\blocks.py", line 1007, in process_api data = self.postprocess_data(fn_index, result["prediction"], state) File "C:\Users\Asus\AI\RVC-beta\RVC-beta-v2-0528\runtime\lib\site-packages\gradio\blocks.py", line 953, in postprocess_data prediction_value = block.postprocess(prediction_value) File "C:\Users\Asus\AI\RVC-beta\RVC-beta-v2-0528\runtime\lib\site-packages\gradio\components.py", line 2076, in postprocess processing_utils.audio_to_file(sample_rate, data, file.name) File "C:\Users\Asus\AI\RVC-beta\RVC-beta-v2-0528\runtime\lib\site-packages\gradio\processing_utils.py", line 206, in audio_to_file data = convert_to_16_bit_wav(data) File "C:\Users\Asus\AI\RVC-beta\RVC-beta-v2-0528\runtime\lib\site-packages\gradio\processing_utils.py", line 219, in convert_to_16_bit_wav if data.dtype in [np.float64, np.float32, np.float16]: AttributeError: 'NoneType' object has no attribute 'dtype'"